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<p>Tb<sup>3+</sup>-activated lanthanum cerium phosphate (LaCePO<sub>4</sub>) phosphors are synthesized using the modified solid-state reaction method. X-ray diffraction (XRD) patterns indicate a uniform crystalline structure. Scanning electron microscopy (SEM) images reveal that the samples had a large grain size and irregular, nonhomogeneous shape. The thermoluminescence (TL) glow curve is recorded for an optimized concentration of doping ion, and it shows the broad TL glow curve centred at 370°C for the UV-exposed sample. The corresponding trap parameters are calculated using the computerized glow curve deconvolution (CGCD) technique. CGCD analysis indicates that most of the peaks exhibit first-order and general-order kinetics, with shape factor (μ) values ranging from 0.313 to 0.568. The prepared phosphor may be useful in TL dosimetry applications.</p>

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Structural and Thermoluminescence Studies on Tb3+-Activated Lanthanum Cerium Phosphate Phosphor for Dosimetry Application

  • 期刊论文

  • 发表日期：

    2026年1月15日

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  • K. Lakshmi,
  • M. C. Rao,
  • Vikas Dubey

摘要

Tb3+-activated lanthanum cerium phosphate (LaCePO4) phosphors are synthesized using the modified solid-state reaction method. X-ray diffraction (XRD) patterns indicate a uniform crystalline structure. Scanning electron microscopy (SEM) images reveal that the samples had a large grain size and irregular, nonhomogeneous shape. The thermoluminescence (TL) glow curve is recorded for an optimized concentration of doping ion, and it shows the broad TL glow curve centred at 370°C for the UV-exposed sample. The corresponding trap parameters are calculated using the computerized glow curve deconvolution (CGCD) technique. CGCD analysis indicates that most of the peaks exhibit first-order and general-order kinetics, with shape factor (μ) values ranging from 0.313 to 0.568. The prepared phosphor may be useful in TL dosimetry applications.